Multiple choice

In two air standard cycles - one operating on the Otto and the other on the Brayton cycle - air is entropically compressed from 300 to 450 K, heat is added to raise the temperature to 600 K in the Otto cycle and to 550 K in the Brayton cycle. If Wo and WB are work outputs per unit mass, then

  1. Wo >WB

  2. Wo <WB

  3. Wo =WB

  4. It is not possible to calculate the work outputs unless the temperature after the expansion is given.

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Explanation